Adding Lascaux Screenprinting Paste to acrylic colours enables one to work in silkscreen technique as part of a 100% water-based system. This feature is especially practical for schools. Stencils and cleaning materials must be compatible with a water-based system. Lascaux Screenprinting Paste also functions as a retarder, prolonging the drying time during printing and facilitating cleaning the screens. It also can be used as a retarder in painting.